SPMWHT541MD5WARMSB LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WARMSB is a Samsung Semiconductor LM561B series cool white LED (5000K) designed for surface mount lighting applications. This component features a 5630 package format with 4-SMD flat lead exposed pad configuration, delivering 31 lumens at 65mA test current with 120° viewing angle.

The SPMWHT541MD5WARMSB carries a "Not For New Designs" product status designation. This status indicates the part remains available in inventory but Samsung has transitioned this product line. Identifying equivalent substitute parts ensures design continuity and access to actively supported alternatives with compatible electrical and mechanical specifications.

Substiute Parts

SPMWHT541MD5WARMSB

Samsung Semiconductor, Inc.In Stock: 768SPMWHT541MD5WARMSB Datasheet

Current PartRFQ

SPMWHT541MP5WARKS4

Samsung Semiconductor, Inc.In Stock: 73422SPMWHT541MP5WARKS4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWHT541MD5WARMSB is determined by strict alignment of the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Color and correlated color temperature (CCT): White, Cool 5000K
• Forward voltage (Vf): 2.95V nominal
• Test current: 65mA
• Viewing angle: 120°
• Color Rendering Index (CRI): 80

Mechanical Compatibility Criteria:

• Package type: 4-SMD configuration
• Supplier device package: 5630
• Physical dimensions: 5.00mm × 3.00mm footprint
• Height constraint: ≤0.90mm seated maximum

Environmental & Compliance Criteria:

• RoHS compliance status
• Moisture Sensitivity Level (MSL): 2A (4 Weeks)

The SPMWHT541MP5WARKS4 satisfies all substitution criteria within these defined parameters. Both parts share identical base product number (SPMWHT541), electrical specifications, and mechanical form factor, enabling direct functional replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

SPMWHT541MD5WARMSB (Original Part):

• Current inventory status: 726 pieces available
• Product status: Not For New Designs
• Suitable for: Existing design maintenance, legacy system support, and short-term production runs where inventory is available
• Compliance: RoHS Compliant

SPMWHT541MP5WARKS4 (Substitute Part):

• Current inventory status: 73,313 pieces available
• Product status: Active
• Suitable for: New designs, long-term production programs, and designs requiring sustained component availability
• Compliance: ROHS3 Compliant (enhanced environmental standard)

Selection Basis:

The SPMWHT541MP5WARKS4 is the recommended substitute for new design implementations. This part maintains electrical equivalence (identical Vf, test current, color, and CRI) while offering improved performance characteristics: higher luminous flux (34lm vs. 31lm), superior efficiency (177 lm/W vs. 162 lm/W), higher maximum current rating (180mA vs. 150mA), lower thermal resistance (15°C/W vs. 16°C/W), and reduced package height (0.80mm vs. 0.90mm).

The substitute part's Active product status ensures long-term availability and continued manufacturer support. Both parts share identical base product number, forward voltage, test current, viewing angle, CRI, and physical footprint, enabling direct PCB-level substitution without design modification.

Packaging format differs (Cut Tape vs. Tape & Reel); procurement and assembly processes should account for this distinction.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WARKS4 replace SPMWHT541MD5WARMSB in existing PCB designs?

A: Yes. Both parts share identical electrical specifications (2.95V Vf, 65mA test current, 5000K CCT, 80 CRI, 120° viewing angle) and mechanical footprint (5630 package, 5.00 × 3.00mm, 4-SMD configuration). Direct PCB-level substitution is supported without design changes.

Q: What are the performance differences between these parts?

A: The SPMWHT541MP5WARKS4 (LM561B Plus) delivers higher luminous flux (34lm vs. 31lm at 65mA), improved efficiency (177 lm/W vs. 162 lm/W), higher maximum current rating (180mA vs. 150mA), lower thermal resistance (15°C/W vs. 16°C/W), and reduced package height (0.80mm vs. 0.90mm). These represent performance enhancements within the same electrical operating point.

Q: Why is the original part marked "Not For New Designs"?

A: "Not For New Designs" status indicates Samsung has transitioned this product line. The LM561B Plus series (SPMWHT541MP5WARKS4) represents the active successor. Existing inventory of the original part remains available for legacy support, but new designs should specify the active substitute.

Q: Are there packaging differences between these parts?

A: Yes. SPMWHT541MD5WARMSB is supplied in Tape & Reel (TR) format, while SPMWHT541MP5WARKS4 is supplied in Cut Tape (CT) format. Both formats are standard surface mount packaging; selection depends on assembly equipment and production volume requirements.

Q: Do both parts meet the same environmental compliance standards?

A: Both parts are RoHS compliant. SPMWHT541MD5WARMSB meets RoHS Compliant specification, while SPMWHT541MP5WARKS4 meets the enhanced ROHS3 Compliant specification. Both share identical MSL rating (2A, 4 Weeks).

Q: Can the substitute part operate at higher currents than the original?

A: Yes. SPMWHT541MP5WARKS4 has a maximum current rating of 180mA compared to 150mA for SPMWHT541MD5WARMSB. However, both parts are tested and specified at 65mA. Higher current operation requires thermal management verification for the specific application.

Q: What is the thermal performance difference?

A: SPMWHT541MP5WARKS4 exhibits lower thermal resistance (15°C/W vs. 16°C/W) and reduced package height (0.80mm vs. 0.90mm), resulting in improved thermal dissipation characteristics. This supports higher current operation and extended thermal headroom in space-constrained applications.

Q: Are the color and brightness specifications identical?

A: Color specifications are identical (White, Cool, 5000K, CRI 80). Brightness differs slightly: SPMWHT541MP5WARKS4 delivers 34lm (33–35lm range) versus 31lm (29–33lm range) for SPMWHT541MD5WARMSB at the same 65mA test current. This represents a performance improvement in the LM561B Plus series.